Grammarly vs ProWritingAid
Each tool covers a slightly different feature mix. Scan the table below to compare.
| Grammarly | ProWritingAid | |
|---|---|---|
| Company | ||
| Founded | 2009 | 2012 |
| HQ | San Francisco, USA | London, United Kingdom |
| AI model | Proprietary | Proprietary |
| User base | 40 million+ | 4 million+ |
| Platforms | Web, Windows, Mac, iOS, Android, Chrome, Safari, Firefox, Edge, MS Office, Google Docs | Web, Chrome Extension, Firefox Extension, Edge Extension, Google Docs, Microsoft Word, Desktop Editor, Scrivener |
| Languages | English primary, with fluency support for non-native English speakers | English only |
| Pricing | ||
| Free plan | Yes | Yes — 500 word limit, 2 report runs/day, 3 Sparks/day, 10 Rephrases/day |
| Free trial | Yes — 7-day free trial for Pro | Yes — Free plan available with limited features; 3-day money-back on paid plans |
| Starting price | $12/mo (Pro plan, billed annually) | $10.00/mo (Premium, billed yearly at $120/yr) |
| Enterprise | Custom | — |
| Refund policy | — | 3-day money-back guarantee on yearly and lifetime plans; no refunds on monthly plans |
| All plans | Free$0/moPro$30/moEnterpriseContact Sales | Premium$30/moPremium Pro$36/moPremium Lifetime$399 one-timePremium Pro Lifetime$699 one-time |
| Positioning | ||
| Best for | Individuals, teams, and enterprises seeking AI-powered writing assistance, grammar checking, and tone improvement | Novelists, fiction writers, and long-form content creators seeking deep editing and style analysis |
| Differentiator | The most widely adopted AI writing assistant, trusted by 40 million users and 50,000 organizations, offering real-time grammar, tone, plagiarism, and AI detection with enterprise-grade security and style guide enforcement. | ProWritingAid offers the most in-depth manuscript-level analysis with 25+ writing reports, Chapter Critique, and Virtual Beta Reader specifically tailored for fiction and long-form storytelling—going far beyond grammar checking. |
| Competitors | Hemingway Editor, ProWritingAid, QuillBot, Jasper, Copy.ai, Writer | Grammarly, Hemingway Editor, Scrivener, AutoCrit, Wordtune |
| Features | ||
| AI Copywriting | ✓ | ✓ |
| AI Research | ✕ | ✕ |
| Brand Voice | Deep — brand tones (1 on Free, unlimited on Enterprise), style guide, knowledge share, snippets | Basic — custom style guide and terminology management on Premium |
| Bulk Generation | ✕ | ✕ |
| Content Editor | ✓ | ✓ |
| Grammar Style | ✓ | ✓ |
| Image Generation | ✕ | ✕ |
| Long Form Writing | ✓ | ✓ |
| Paraphrasing | ✓ | ✓ |
| Plagiarism Checker | Built-in — available on Pro and Enterprise plans | Built-in — available as add-on Story Credits purchase |
| SEO Optimization | ✕ | ✕ |
| Short Form Writing | ✓ | ✓ |
| Templates | ✕ | ✕ |
| Integrations | ||
| API Access | — | ✕ |
| Chrome Extension | ✓ | ✓ |
| CMS | — | ✕ |
| Google Docs | ✓ | ✓ |
| Key Integrations | Google Docs, Microsoft Office (Word), Chrome, Safari, Firefox, Edge, Windows desktop app, Mac desktop app, iPhone, iPad, Android, Zendesk (shown in marketing) | Microsoft Word, Google Docs, Scrivener, Chrome Extension, Firefox Extension, Edge Extension, Desktop Editor |
| Wordpress | ✕ | ✕ |
| Zapier | — | ✕ |